Tea leaf fixation device

Abstract

The utility model belongs to the field of tea leaf fixation devices, and particularly relates to a tea leaf fixation device which comprises a shell, a rotary drum assembly and a microwave assembly are fixedly connected in the shell, the microwave assembly comprises a protective cover fixedly connected to the inner wall of the shell, and a notch is formed in the top face of the protective cover. A microwave generator is fixedly connected to the surface of the notch, a temperature sensor is fixedly connected to the interior of the mounting hole of the protective cover, and the control panel is electrically connected with the microwave generator, the temperature sensor and the air heater through wires. High-frequency electromagnetic waves generated by the microwave generator directly act on moisture in tea leaves, the hot-air blower forms hot air circulation through the protective cover ventilation holes and the baking cage ventilation holes, and the function of synchronously heating the inside and the outside of the tea leaves is achieved through the structural design of a dual heating mode of the microwave generator and the hot-air blower of the microwave assembly. The problem that the outside is dry and the inside is wet due to traditional hot air drying is solved, and the tea fixation quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of tea fixing devices, specifically a tea fixing device. Background Technology

[0002] Fixing (or killing the green) is one of the initial processing steps for green tea, yellow tea, black tea, oolong tea, pu-erh tea, and some red teas. Its main purpose is to use high temperatures to destroy and deactivate the oxidase activity in fresh leaves, inhibit the enzymatic oxidation of tea polyphenols, evaporate some of the moisture from the leaves, soften the tea leaves, making them easier to roll and shape, and simultaneously remove any grassy odor, promoting the formation of a pleasant aroma. The main methods of fixing tea leaves are pan-frying and drum-type fixing.

[0003] In the prior art, such as in publication number CN219318891U, a tea-fixing device is disclosed, which includes: a frame, a drying chamber, a hot air assembly, a rotating shaft, and a drive assembly. The frame is mounted on a pre-defined mounting plane, and the rotating shaft extends from one end of the drying chamber to the other. The drying chamber is a cylindrical structure and is rotatably connected to the top side of the frame via the rotating shaft. The hot air assembly and the drive assembly are both located on the top surface of the frame. The output end of the hot air assembly is connected to the drying chamber, and the output end of the drive assembly drives and connects to the outer surface of the side wall of the drying chamber. The rotating shaft is a hollow tubular structure and has a first connecting part, a second connecting part, and an air outlet that are interconnected. The air outlet has several air holes. The tea-fixing device disclosed in this invention generates hot air through the hot air assembly, and the hot air is transmitted to the interior of the drying chamber through the rotating shaft. During this process, the hot air is sprayed out through several air holes to dry the tea leaves inside the drying chamber.

[0004] Although the aforementioned patent achieves the effect of drying tea by heating the inside of the drying chamber with hot air, the process of drying tea with hot air first heats the outer surface of the tea leaves and then slowly heats the inside of the tea leaves, which can easily lead to the outside being over-dried while the inside is not fully heated. At the same time, the operation of removing the tea leaves after drying is cumbersome, as it is impossible to disassemble the structure for removal, resulting in low removal efficiency. Therefore, a tea fixing device is proposed to address the above problems. Utility Model Content

[0005] To address the shortcomings of existing technologies and the problems with tea fixing devices, this utility model proposes a tea fixing device.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a tea fixing device according to this utility model includes a shell, and a rotating drum assembly and a microwave assembly are fixedly connected inside the shell.

[0007] The rotary drum assembly includes a limiting square tube fixedly connected to the inner wall of the outer shell. A shaped block is magnetically connected inside the limiting square tube. A drying cage is fixedly connected to one end of the shaped block. A feed inlet is opened at one end of the drying cage. Hinges are symmetrically fixedly connected to the surface of the feed inlet. A side cover is fixedly connected to the side of the hinge. An insert is fixedly connected to the back of the side cover. A snap-fit ​​structure is snapped onto the surface of the insert. The snap-fit ​​structure is fixedly connected to the inner wall of the feed inlet.

[0008] The microwave assembly includes a protective cover fixedly connected to the inner wall of the outer shell. The top surface of the protective cover has a notch, and a microwave generator is fixedly connected to the surface of the notch. A temperature sensor is fixedly connected inside the mounting hole of the protective cover.

[0009] A hot air blower is installed on the top surface of the outer casing. A cover plate is fitted onto one end of the outer casing. A sealing ring and a rubber block are fixedly connected to the side of the cover plate. The rubber block and the side cover form a compression fit. An explosion-proof outer casing is fixedly connected to the side of the outer casing. A control panel is fitted inside the explosion-proof outer casing. A side plate is provided at one end of the outer casing. A drive motor is fixedly connected to the back of the side plate. The output end of the drive motor passes through the side plate and is fixedly connected to one end of the outer casing. A support plate is rotatably connected to the bottom surface of the other end of the outer casing.

[0010] Preferably, the explosion-proof housing is welded and fixed to the side of the housing, the control panel is embedded inside the explosion-proof housing, and the control panel is electrically connected to the microwave generator, temperature sensor and hot air blower respectively through wires.

[0011] Preferably, the protective cover has a microwave shielding mesh at the notch, the transmitter of the microwave generator faces the central axis of the drying cage, and the probe of the temperature sensor extends to the outer wall of the drying cage.

[0012] Preferably, the output shaft of the drive motor is coaxially fixed with the end center of the housing, and a heat dissipation grille is provided on the back of the side plate, which is aligned with the heat dissipation port of the drive motor.

[0013] Preferably, the top surface of the outer shell is provided with an air inlet communicating with the hot air blower, the top surface of the protective cover is provided with longitudinally arranged ventilation holes, the ventilation holes and the air inlet form a hot air circulation channel, and the side wall of the drying cage is provided with evenly distributed ventilation holes.

[0014] Preferably, the support plate is rotatably connected to the bottom surface of the outer shell via a rotating shaft, and the rubber block of the cover plate has a trapezoidal protrusion structure, with the extrusion surface of the rubber block fitting against the outer contour curved surface of the side cover.

[0015] The advantages of this utility model are:

[0016] 1. This utility model uses high-frequency electromagnetic waves generated by a microwave generator to directly act on the internal moisture of tea leaves. The hot air blower forms a hot air circulation through the ventilation holes of the protective cover and the air vents of the drying cage. The dual heating mode structure design of the microwave generator and the hot air blower in the microwave component realizes the function of simultaneous heating of the tea leaves inside and outside, solves the problem of external dryness and internal moisture caused by traditional hot air drying, and improves the quality of tea leaf fixation.

[0017] 2. This utility model uses a magnetic connection between a limiting square tube and a shaped block to allow the drying cage to be quickly assembled and disassembled. During operation, simply align the shaped block with the limiting square tube and insert it to fix it. When separating, it can be directly pulled out. This structural design realizes the function of quick assembly and disassembly of the drying cage, solves the problem of inconvenience in handling dried tea leaves, and improves the efficiency of tea leaf handling. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the rotating drum assembly structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the microwave component structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the disassembled structure of this utility model.

[0023] In the diagram: 1. Outer shell; 2. Rotary drum assembly; 21. Limiting square tube; 22. Irregular block; 23. Drying cage; 24. Hinge; 25. Side cover; 26. Insert block; 27. Snap-fit ​​structure; 3. Microwave assembly; 31. Protective cover; 32. Microwave generator; 33. Temperature sensor; 4. Hot air blower; 5. Cover plate; 6. Sealing ring; 7. Explosion-proof shell; 8. Control panel; 9. Side plate; 10. Drive motor; 11. Support plate; 12. Rubber block. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0025] Please see Figures 1-4 As shown, a tea fixing device includes a shell 1. A rotating drum assembly 2 and a microwave assembly 3 are fixedly connected inside the shell 1. The microwave assembly 3 includes a protective cover 31 fixedly connected to the inner wall of the shell 1. A notch is opened on the top surface of the protective cover 31. A microwave generator 32 is fixedly connected to the surface of the notch. A temperature sensor 33 is fixedly connected inside the mounting hole of the protective cover 31.

[0026] During operation, the protective cover 31 is fixed to the top of the inner wall of the outer shell 1 by bolts and is made of aluminum shielding housing. A microwave shielding mesh is embedded in the notch opened on the top surface of the protective cover 31. The microwave generator 32 is vertically installed in the center of the notch through a flange and the transmitting end points to the central axis of the drying cage 23. The waveguide of the microwave generator 32 extends to the outside of the protective cover 31 and is connected to the high voltage circuit of the control panel 8. The temperature sensor 33 is an infrared temperature measurement module and is fixed in the mounting hole on the side wall of the protective cover 31 by threads. The probe of the temperature sensor 33 extends through the side hole of the protective cover 31 to 5mm on the outer side wall of the drying cage 23. The signal line of the temperature sensor 33 is routed along the inner wall of the outer shell 1 and connected to the AD conversion interface of the control panel 8.

[0027] Furthermore, the rotary drum assembly 2 includes a limiting square tube 21 fixedly connected to the inner wall of the outer shell 1. A special-shaped block 22 is magnetically connected inside the limiting square tube 21. A drying cage 23 is fixedly connected to one end of the special-shaped block 22. A feed inlet is opened at one end of the drying cage 23. A hinge 24 is symmetrically fixedly connected to the surface of the feed inlet. A side cover 25 is fixedly connected to the side of the hinge 24. An insert 26 is fixedly connected to the back of the side cover 25. A snap-fit ​​structure 27 is snapped onto the surface of the insert 26. The snap-fit ​​structure 27 is fixedly connected to the inner wall of the feed inlet.

[0028] During operation, the limiting square tube 21 is fixed to the inner wall of the outer shell 1 by welding and has a rectangular cavity structure. The irregular block 22 is made of ferromagnetic material and its outer contour matches the inner cavity of the limiting square tube 21. After the irregular block 22 is inserted into the limiting square tube 21, it is axially fixed by magnetic attraction. The drying cage 23 is a stainless steel mesh cylinder and is coaxially connected to the irregular block 22 by bolts. The edge of the feed port of the drying cage 23 is welded with a hinge 24. The side cover 25 can be opened and closed from 0 to 90° by hinge 24. When the side cover 25 is closed, the insert 26 on its back is embedded in the snap-fit ​​structure 27 on the inner wall of the feed port. The elastic steel sheet of the snap-fit ​​structure 27 forms a three-point locking of the insert 26. When the cover plate 5 is installed, the trapezoidal protrusion of the rubber block 12 squeezes the curved surface of the side cover 25 to form a radial seal between the side cover 25 and the feed port of the drying cage 23. At the same time, the sealing ring 6 and the end face of the outer shell 1 form an axial seal.

[0029] Furthermore, the explosion-proof housing 7 is welded and fixed to the side of the housing 1, and the control panel 8 is embedded inside the explosion-proof housing 7. The control panel 8 is electrically connected to the microwave generator 32, the temperature sensor 33 and the hot air blower 4 through wires respectively.

[0030] During operation, the explosion-proof housing 7 is welded and fixed to the side of the housing 1 to form a fully enclosed protective structure, which effectively blocks microwave leakage and high temperature from damaging the control panel 8. The control panel 8 adopts embedded installation and integrates multiple control circuits. Its touch screen interface is connected to the power adjustment module of the microwave generator 32, the signal receiving end of the temperature sensor 33 and the frequency converter of the hot air blower 4 through wires to realize one-button start / stop, parameter setting and real-time temperature monitoring functions, with an operation response time of less than 0.5 seconds.

[0031] Furthermore, the output shaft of the drive motor 10 is coaxially fixed with the end center of the housing 1, and a heat dissipation grille is provided on the back of the side plate 9, which is aligned with the heat dissipation port of the drive motor 10.

[0032] During operation, the output shaft of the drive motor 10 is rigidly connected to the center of the end of the housing 1 via a flange, ensuring that the concentricity error of the drying cage 23 is less than 0.1mm. The speed can be adjusted to 10-30rpm via the control panel 8. The heat dissipation grille on the back of the side plate 9 adopts a louvered structure, and the grille tilt angle is consistent with the heat dissipation airflow direction of the drive motor 10, which improves the heat dissipation efficiency by 60% and keeps the motor temperature rise below 40℃.

[0033] Furthermore, the top surface of the outer shell 1 is provided with an air inlet that communicates with the hot air blower 4, the top surface of the protective cover 31 is provided with longitudinally arranged ventilation holes, the ventilation holes and the air inlet form a hot air circulation channel, and the side wall of the drying cage 23 is provided with evenly distributed ventilation holes.

[0034] During operation, the air inlet is located at the top of the outer casing 1 and its diameter matches the air outlet of the hot air blower 4. A sealed air duct is formed by flange connection, and the hot air utilization rate is over 95%. The ventilation holes on the top of the protective cover 31 are arranged in a longitudinal array and the hole diameter decreases by 20% from front to back, forming a gradient air pressure so that the hot air can penetrate the ventilation holes of the drying cage 23 evenly. The ventilation holes are 2mm in diameter and 10mm apart, and are distributed in a spiral pattern to ensure that the heating area coverage of the tea layer is greater than 90%, and the hot air penetration time is shortened to 1 / 3 of the traditional structure.

[0035] Furthermore, the support plate 11 is rotatably connected to the bottom surface of the outer shell 1 via a rotating shaft, and the rubber block 12 of the cover plate 5 has a trapezoidal protrusion structure, with the extrusion surface of the rubber block 12 fitting against the outer contour curved surface of the side cover 25.

[0036] During operation, the pivot of the support plate 11 is made of stainless steel and forms a 60° angle with the bottom surface of the outer shell 1 when unfolded, which enhances the stability of the equipment. The trapezoidal protrusion of the rubber block 12 has a hardness of Shore 50A in its silicone material. The radial pressure generated when the cover plate 5 is closed reduces the gap between the side cover 25 and the feed inlet of the drying cage 23.

[0037] Working principle: After the drive motor 10 starts, it drives the drying cage 23 of the rotating drum assembly 2 to rotate through the coaxially connected outer shell 1. At this time, the hot air generated by the hot air blower 4 enters the ventilation hole of the protective cover 31 through the air inlet on the top surface of the outer shell 1, forming a 45° vortex and then penetrating the ventilation holes on the side wall of the drying cage 23 to heat the surface of the tea leaves. At the same time, the microwave generator 32 of the microwave assembly 3 emits 2.45GHz microwaves towards the central axis of the drying cage 23. The microwaves penetrate the internal moisture of the tea leaves to generate molecular vibration heat, realizing synchronous heating inside and outside. The temperature sensor 33 monitors the drying cage 23 in real time. The temperature of the outer wall is fed back to the control panel 8. When the temperature exceeds 80°C, the power of the microwave generator 32 and the wind speed of the hot air blower 4 are automatically reduced. The irregular block 22 of the rotating drum assembly 2 is magnetically fixed to the limiting square tube 21, so that the drying cage 23 maintains dynamic balance when rotating with the outer shell 1. Centrifugal force forces the tea leaves to stick tightly to the inner wall of the drying cage 23 and turn evenly. After the withering is completed, the power supply of the drive motor 10 is disconnected and the support plate 11 is unfolded to stabilize the equipment. After the cover plate 5 is opened, the rubber block 12 releases the pressure on the side cover 25, and the insert block 26 can be released to quickly remove the drying cage 23.

[0038] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, or similar improvements made within the theoretical and principle content of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tea leaf de-enzyming device, characterized by: Including the shell (1), the inside fixed connection of the shell (1) has rotary drum assembly (2) and microwave assembly (3); The rotary drum assembly (2) includes a limiting square tube (21) fixedly connected to the inner side wall of the shell (1), a shaped block (22) is magnetically connected inside the limiting square tube (21), one end of the shaped block (22) is fixedly connected with a drying cage (23), one end of the drying cage (23) is provided with an inlet, the surface of the inlet is fixedly connected with a hinge (24), the side surface of the hinge (24) is fixedly connected with a side cover (25), the back surface of the side cover (25) is fixedly connected with an insertion block (26), the surface of the insertion block (26) is connected with a buckle structure (27), and the buckle structure (27) is fixedly connected to the inner side wall of the inlet. The microwave assembly (3) includes a protective cover (31) fixedly connected to the inner wall of the shell (1), a notch is formed in the top surface of the protective cover (31), a microwave generator (32) is fixedly connected to the surface of the notch, and a temperature sensor (33) is fixedly connected inside the mounting hole of the protective cover (31). The top surface of the shell (1) is provided with a hot air fan (4), one end of the shell (1) is sleeved with a cover plate (5), the side surface of the cover plate (5) is fixedly connected with a sealing ring (6) and a rubber block (12), the rubber block (12) is in extrusion fit with the side cover (25), the side surface of the shell (1) is fixedly connected with an explosion-proof shell (7), the inside of the explosion-proof shell (7) is sleeved with a control panel (8), one end of the shell (1) is provided with a side plate (9), the back surface of the side plate (9) is fixedly connected with a driving motor (10), the output end of the driving motor (10) penetrates through the side plate (9) and is fixedly connected to one end of the shell (1), and the bottom surface of the other end of the shell (1) is rotatably connected with a supporting plate (11).

2. A tea leaf fixation device according to claim 1, wherein: The explosion-proof shell (7) and the side surface of the shell (1) are welded and fixed, the control panel (8) is embedded in the inside of the explosion-proof shell (7), and the control panel (8) is electrically connected with the microwave generator (32), the temperature sensor (33) and the hot air fan (4) through wires.

3. A tea leaf fixation device according to claim 1, wherein: The notch of the protective cover (31) is provided with a microwave shielding net, the emission end of the microwave generator (32) faces the central axis of the drying cage (23), and the probe of the temperature sensor (33) extends to the outer side wall of the drying cage (23).

4. The tea leaf fixation device according to claim 1, characterized in that: The output shaft of the driving motor (10) is coaxially fixed with the center of the end of the shell (1), the back surface of the side plate (9) is provided with a heat dissipation grille, and the heat dissipation grille is aligned with the heat dissipation port of the driving motor (10).

5. The tea leaf fixation device according to claim 1, wherein: The top surface of the shell (1) is provided with an air inlet communicated with the hot air fan (4), the top surface of the protective cover (31) is provided with a longitudinal ventilation hole, the ventilation hole and the air inlet form a hot air circulation channel, and the side wall of the drying cage (23) is provided with uniformly distributed air holes.

6. A tea leaf fixation device according to claim 1, wherein: The support plate (11) is rotatably connected with the bottom surface of the shell (1) through a rotating shaft, the rubber block (12) of the cover plate (5) is in a trapezoidal convex structure, and the extrusion surface of the rubber block (12) is attached to the outer contour curved surface of the side cover (25).

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